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Consolidated Statements of Comprehensive Loss - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Statement of Comprehensive Income [Abstract]      
Net loss $ (52,294) $ (39,229) $ (43,413)
Foreign currency translation adjustment (8,507) 0 0
Unrealized loss on marketable securities, net of tax 0 (5) (9)
Total comprehensive loss $ (60,801) $ (39,234) $ (43,422)